`start` script: reuse tab if possible in more Chromium browsers

[felixhabib]

sku will reuse an existing tab if available in more Chromium browsers.

If the user's default browser is not Chromium based, there will be no change. If it is Chromium based, and the user has multiple supported Chromium browsers installed, the tab will open (or be reused) in:

• The user's default browser, if it is open, or if no browsers are open.
• Another supported browser, if it is open and the default browser is not open.

Using default-browser package instead of x-default-browser as it has support for Microsoft Edge and is more widely used.

NB:

This PR is heavily based on the changes from this PR, referenced here. It is an update to https://github.com/seek-oss/sku/pull/426.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 1fec957730323344cea028703fc26cac00e05775

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ---- | ----- | | sku | Minor |

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